Multicolor voltage-tunable quantum-well infrared photodetector
- 1 December 1993
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Electron Device Letters
- Vol. 14 (12), 566-568
- https://doi.org/10.1109/55.260791
Abstract
A novel concept for a quantum-well infrared photodetector (QWIP) with a spectral response peak tunable by an external voltage is described and tested experimentally. This multicolor detector structure is made by stacking conventional (one-color) QWIPs, separated by thin, heavily doped layers ( approximately=90 nm in the test structure). The most important feature is that externally applied DC voltage is distributed among the different one-color QWIPs according to their DC resistances. Each one-color QWIP therefore turns on sequentially in the order determined by its resistance.<>Keywords
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